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Re: [PATCH v2 0/9] hw, ui, virtfs-proxy-helper: Reduce QEMU .data/.rodat
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From: |
Eric Blake |
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Subject: |
Re: [PATCH v2 0/9] hw, ui, virtfs-proxy-helper: Reduce QEMU .data/.rodata/.bss footprint |
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Date: |
Thu, 5 Mar 2020 08:21:03 -0600 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 |
On 3/5/20 6:45 AM, Philippe Mathieu-Daudé wrote:
Since v1:
- merged 2 series
- reworked hw/usb/quirks
- added R-b/A-b tags
This series reduce the footprint of the QEMU binary:
.bss: 106KiB (moved to .heap)
Why is moving stuff from .bss to .heap beneficial? With .bss,
0-initialization is cheap (the OS gives it to us for free by mapping the
entire .bss to a copy-on-write zero page); but with .heap, we generally
have to zero it at runtime ourselves.
.data: 1MiB
.rodata: 4.34MiB
But reducing these sizes makes sense.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
- [PATCH v2 7/9] ui/curses: Make control_characters[] array const, (continued)
- [PATCH v2 7/9] ui/curses: Make control_characters[] array const, Philippe Mathieu-Daudé, 2020/03/05
- [PATCH v2 9/9] virtfs-proxy-helper: Make the helper_opts[] array const, Philippe Mathieu-Daudé, 2020/03/05
- Re: [PATCH v2 0/9] hw, ui, virtfs-proxy-helper: Reduce QEMU .data/.rodata/.bss footprint, no-reply, 2020/03/05
- Re: [PATCH v2 0/9] hw, ui, virtfs-proxy-helper: Reduce QEMU .data/.rodata/.bss footprint, no-reply, 2020/03/05
- Re: [PATCH v2 0/9] hw, ui, virtfs-proxy-helper: Reduce QEMU .data/.rodata/.bss footprint, Daniel P . Berrangé, 2020/03/05
- Re: [PATCH v2 0/9] hw, ui, virtfs-proxy-helper: Reduce QEMU .data/.rodata/.bss footprint, no-reply, 2020/03/05
- Re: [PATCH v2 0/9] hw, ui, virtfs-proxy-helper: Reduce QEMU .data/.rodata/.bss footprint,
Eric Blake <=